How old is your dog? When does he bite?? Do you chain your dog? How much exercise do you provide to your dog?? It's not that Indian dogs bite while imported don't. Usually, aggression starts from the puppy hood. If the owner doesn't socialise the puppy properly, chain the dog all day, doesn't take the dog out for exercise, the puppy is likely to have behavioral problems like aggression.
Right now, it's difficult to say anything, because you haven't provided any information.